Lamp.



J. D. LANDERS & G. JOHNSON. LAMP.

APPLIOATION rum) OCT. 16, 1901.

914,148.' Patented Mar. 2, 1909 WITNESSES I v TORS' PATENT @IFFIC JOHNDAVID LANDERS AND GUSTAVUS JOHNSON, OF

WINNIPEG, MANITOBA, CANADA.

LAMP.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed October 16, 1907. Serial No. 397,671.

To all whom it may concern:

Be it known that we, JOHN DAVID LAN- DERS and GUsTAvUs JoI-iNsON, bothof the city of l/Vinnipeg, in the Province of Manitoba, Canada, havejointly invented certain new and useful Improvements in Lamps, of whichthe following is the specification.

Our invention relates to improvements in lamps, and the object of theinvention is to provide an improved construction in devices or heatingsignal or heavy oils in lamps and lanterns by means of the lamp flame,and it consists essentially of a looped hollow tube secured to theburner, a continuous metallic loop surrounding the flame, and in a planeat right angles thereto, and means for allowing for circulation throughthe tube, all arranged and constructed as hereinafter more particularlydescribed.

Figure 1 is a perspective view of a flat wick lamp burner, provided withour invention. Fig. 2 is a plan view of the burner and the attachment,as in Fig. 1. Fig. 3 is a vertical sectional view, the section beingtaken in a plane denoted by the line X X in Fig. 2. Fig. 4 is anenlarged, detailed, perspective view of the caps secured to the tube.

In the drawings like letters of reference indicate corresponding partsin each figure.

A represents the wick tube of a burner, and B the screw cap, in whichthe aforesaid tube is secured.

O is a metallic wire loop, and D is a hollow metallic tube in the formof a loop, and having its free ends D D extending upwardly through thescrew cap B. The wire C onvelops the base of the flame, extending in aloop, substantially in a plane at right angles to the flame. The freeends of the wire C O pass downwardly practically at right angles to theplane of the loop, and extend into the open end D of the tube D. It willbe noted, referring to Fig. 3, that the end O extends well into thetube, and that the end 0 is shorter, and does not extend below the upperface of the screw cap. This allows that a continuous air passage may behad throughout the tube, opening at one end at E, above the face of theburner (the extending end 0 does not fill the tube). The other end ofthe tube has an opening E above the face of the screw cap, and the endof the tube is othen I wise closed. It will be understood that the Iextending ends of the wire 0 make a tight joint with the tube, so thatno air has access I to the tube, except through the opening E.

We are aware that various forms of heatwires have heretofore been used,and that such have a wire loop extending into or enveloping the flame,and have one of the ends of the loop extending downwardly into the wick.However in these forms, considerable time is taken to heat the wirethroughout its length and they are also subject to ex cess of heat. Inthe form which we employ the tube is necessarily of larger circumferencethan the wire, and in this way there is an enlarged radiating surface tothe oil of the lamp. Further the extending ends of the wire C, withinthe tube, primarily heat the air within the tube. This causes acirculation through the tube loop, the heated air surrounding the wicktube passing inwardly I through the opening E and outwardly through theopening E owing to the end D being raised to a higher temperature thanthe end D In this way the complete interior of the tube D is quicklyheated, as the heated air circulates freely throughout its entirelength, and the heat is continuously more or less uniform.

If it be found in practice that the openings E E in the tube are easilyfilled or clogged, such may be done away with by having a hole F at theend of the tube, and placing a cap F (Fig. 4) over the opening. A lip Fcould be placed over the opening E.

What we claim as our invention is:

1. In a device of the class described the combination with a wick tubeand burner cap, of a hollow looped tube extending downwardly from thecap, one end of said tube being closed and having a perforation thereinabove the top of the burner cap, a

ing

heating wire loop above the wick tube and in a plane at right anglesthereto, the said loop having its free ends passing downwardly into theopen end of the looped tube, as and for the purpose specified.

2. In a device of the class described the l combination with a wick tubeand a burner cap, of a looped hollow tube extending downwardly from theburner cap and having one of its ends closed, a heating wire loop 10closed end of said above the Wick tube and in a plane at right I anglesthereto, the said Wire having one of its ends extending down into theopen end of the tube to a point below the top of the burner cap, and theother end extending into the tube above the top of the burner cap, thesaid tube having an opening therein below said last named end of theheating Wire and above the top of the burner cap, and the tube having aperforation above the burner cap, as and for the purpose specified.

Signed at Winnipeg, in the Province of Manitoba, this 7th day of Septr.1907.

JOHN DAVID LANDERS. GUSTAVUS JOHNSON.

Witnesses:

JAS. M. TAPLEY, GERALD S. RoXBUnen.

